Why $_GET['i'] doesn't unsets ?
Your page URL has ?i=asdf in it. As such, $_GET['i'] is being set every time you refresh that particular URL. Unsetting $_GET['i'] will only erase the variable for that instance of that PHP script. As soon as you refresh, you are calling a new instance of that PHP script and assigning $_GET['i'] the value "asdf" (or whatever).
Not using GET means rewriting all the pages.
Ok then I'll use a session variable.
Thanks you all.
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